I have a Peugeot 306 HDi 1999-reg with a 30-fuse fuse box. The ignition light does not come on before starting and does remain on while the engine is running. The clock no longer displays. I can't see any other faults. I have replaced the only blown fuse which is at the bottom right (number 30?) and it blows within a few seconds of turning the ignition on (until it blows, the ignition light comes on before starting, as expected).
Is the car safe to drive, subject to lack of rear wipers, clock etc that are apparently controlled by this fuse, or will the car be running off the battery and not charging the battery?
One thing to add: the description of the fuse mentions "ignition light" as if it controls the circuitry that detects whether charging is taking place. Could it be that the battery is charging OK but the detection circuitry that controls the light has been affected by the blown fuse. I'd check the voltage at the battery for the two cases of engine being off and running, but I don't have a voltmeter with me.
Well I left it a few days but no-one's responded, which is a shame.
I located the problem. The clue was in the list of devices being controlled by the fuse that kept blowing: ignition light, clock, electric windows and rear wiper. I suddenly remembered that I'd had occasional problems with the rear wiper a few months ago - it occasionally operated even when the switch on the stalk was turned off.
Could the wiper have developed a more serious problem now which was causing it to short-circuit? I undid the cover on the tailgate (why couldn't they have used Philips screws instead of obscure Torx ones - thank goodness I had a Torx screwdriver bit in my tool kit!) and unplugged the two two-pin connectors. This allowed me to replace the fuse without it blowing.
Normal service (apart from the rear wiper) has now been resumed: the clock and electric windows work, and, most importantly, the ignition light no longer comes on when the engine is running, so I was able to make a 200-mile journey back home without needing the services of the RAC.
> Clipped inside the tailgate is (usually) a relay for the rear wiper motor. Remove it
> from the car and open it up.You may find it full of water.hth
Good suggestion. The relay doesn't sound as if there's any water sloshing around in it. Unfortunately I can't unplug the blue relay from the black connector (which is almost as big!): the spade terminals don't seem to want to shift and it's difficult working on it when it's about six feet in the air. OK, I could get in the boot and work on it with the tailgate closed, I suppose!
I imagine a new relay would be a lot cheaper than a new motor, so I hope it's the relay. I've got a car electrician coming to look next week so I'll see what he finds.